Lezyne make lovely kit, not always that well conceived (screw on pumps, aaargh) but always beautifully made. Topeak on the other hand seem to specialise in brilliantly thought out kit that’s slightly poorly executed. They should have kids.
Anyway. Tiny wee mini pumps are all rubbish, it just comes with the territory. Also, you don’t really save that much space. So after messing around with little ones I got a sensibly sized Truflo Evolution which doesn’t take up much more space and fits neatly up the side of my camelbak reservoir, and inflates tyres with far less hassle and far faster.